Ice Sheet and Solid Earth Influences on Far-Field Sea-Level Histories

Author:

Bassett Sophie E.123,Milne Glenn A.123,Mitrovica Jerry X.123,Clark Peter U.123

Affiliation:

1. Department of Earth Sciences, University of Durham, Durham DH1 3LE, UK.

2. Department of Physics, University of Toronto, Toronto, Ontario M5S 1A7, Canada.

3. Department of Geosciences, Oregon State University, Corvallis, OR 97331, USA.

Abstract

Previous predictions of sea-level change subsequent to the last glacial maximum show significant, systematic discrepancies between observations at Tahiti, Huon Peninsula, and Sunda Shelf during Lateglacial time (∼14,000 to 9000 calibrated years before the present). We demonstrate that a model of glacial isostatic adjustment characterized by both a high-viscosity lower mantle (4 × 10 22 Pa s) and a large contribution from the Antarctic ice sheet to meltwater pulse IA (∼15-meters eustatic equivalent) resolves these discrepancies. This result supports arguments that an early and rapid Antarctic deglaciation contributed to a sequence of climatic events that ended the most recent glacial period of the current ice age.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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